GW2 multi

do somebody know a way to run GW2 multible times? i tried it with VMware, Sandboxie, Multiwars(getting a blackscreen) and the tool from mmominion.
the tool from mmominion worked for me till 18.04.14 after this date it crashes all the time.

if someone intodruce me how to fix the blackscreen with Multiwars or give me an other possibility to run GW2 two times.